Friday morning at 11:06 hrs, Adam County Company 20, the Alpha Fire Department from Littlestown Pa was dispatched to 372 Lexington Way for an inside investigation of a gas leak, meeting with Columbia Gas Company. Engine 202 arrived with normal conditions, after verifying no one home, forced entry into the house. Four firefighters were working in the basement when an explosion occurred, injuring all four members. Command 20 requested a box alarm assignment as well as three Advances Life Support units and BLS units, along with medivacs. Two firefighters were flown to the Bayview Burn Center in Baltimore Maryland for treatment of their injuries.